Jarkko Nieminen won a third-set tie-break to beat Leonardo Mayer in the first round of the Nastase Tiriac Trophy in Bucharest on Monday.
The Finnish left-hander took more than two hours on the outdoor clay to come through 6-3 3-6 7-6 (7/4).
Former world No 13 Nieminen will now face either Lukas Rosol or Filippo Volandri.
Jeremy Chardy was denied the chance to face top seed Grigor Dimitrov after the Frenchman was beaten 7-6 (7/3) 6-0 by 20-year-old Czech star Jiri Vesely.
The only other first round match completed saw Sergiy Stakhovsky beat wildcard entry Patrick Ciorcila from Romania 2-6 6-2 6-1.